Tester having a pair of indicator lamps for electric single phase wattmeter sockets

Claim 1

A CIRCUITRY TESTER FOR A SINGLE PHASE WATTMETER SOCKET HAVING POWER INPUT CIRCUIT AND LOAD CIRCUIT CLIPS THEREIN CONNECTED TO CORRESPONDING POWER AND LOAD CIRCUITS RESPECTIVELY COMPRISING A UNITARY BODY OF DIELECTRIC MATERIAL DIMENSIONED FOR SLIDABLE INSERTION INTO SAID SOCKET INCLUDING A HANDLE ON THE FRONT SIDE THEREOF FOR INSERTING THE SAID BODY IN PREDETERMINED POSITION, A PAIR OF SPACED CONDUCTING INPUT BLADES PROJECTING FROM THE REAR SIDE OF SAID BODY OPPOSITE THE SAID HANDLE FOR ENGAGING CORRESPONDING SAID POWER INPUT CIRCUIT CLIPS IN SAID SOCKET, A PAIR OF SPACED OUTPUT CONDUCTING BLADES PROJECTING FROM THE SAID REAR SIDE OF SAID BODY FOR ENGAGING A CORRESPONDING PAIR OF OUTPUT LOAD CIRCUIT CLIPS IN SAID SOCKET, A PAIR OF INDICATING ELECTRIC LAMPS IN SAID BODY VISIBLE FROM THE SAID FRONT SIDE THEREOF WHEN ENERGIZED, A RESISTOR OF PREDETERMINED VALUE CONNECTED BETWEEN ONE TERMINAL OF EACH OF SAID LAMPS AND EACH OF SAID INPUT BLADES RESPECTIVELY FOR REDUCING THE NORMAL BRILLIANCY OF SAID LAMPS WHEN ENERGIZED, THE REMAINING TERMINAL OF EACH OF SAID LAMPS CONNECTED TO EACH OF SAID OUTPUT BLADES RESPECTIVELY, A NORMALLY OPEN SINGLE CIRCUIT MOMENTARY SWITCH IN SAID BODY POSITIONED FOR OPERATION FROM THE FRONT SIDE THEREOF WITH EACH TERMINAL THEREOF CONNECTED TO EACH OF SAID OUTPUT BLADES RESPECTIVELY WHEREBY SAID LAMPS WILL OPERATE AT A PREDETERMINED BRILLIANCY LESS THAN NORMAL WHEN SAID SWITCH IS OPERATED AND SAID OUTPUT BLADES ARE NORMALLY ENERGIZED BY SAID INPUT CIRCUIT AND WHEREBY THE OPERATION OF SAID LAMP AT A GREATER BRILLIANCY WILL INDICATE EXCESSIVE POWER CIRCUIT VOLTAGE AND WHEREBY THE ILLUMINATION OF EITHER OF SAID LAMPS WITHOUT DEPRESSING SAID SWITCH INDICATES A GROUND FAULT IN AID LOAD CIRCUIT AND WHEREBY THE ENERGIZING OF BOTH SAID LAMPS WITHOUT DEPRESSING SAID SWITCH INDICATES A SHORT CIRCUIT OF SAID LOAD CIRCUIT.